Lenovo ThinkCentre A70z, ThinkCentre. Processor clock speed: 2.7 GHz. Internal memory: 2 GB, Maximum internal memory: 4 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 320 GB, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD-RW. Display diagonal: 482.6 mm (19 "), Display resolution: 1440 x 900 pixels, Aspect ratio: 16:10